Microwave unit door with viewing window

Abstract

The door for a microwave unit with a viewing window has a metallic door frame, two glass panes held spaced apart from each other between the metallic door frame and a fine woven fabric for blocking microwaves arranged between the glass panes. The fine woven fabric consists of thin metal fibers woven together preferably in a linen or plain weave and is in electrically conductive contact with the door frame. In order to improve observation of the interior of the microwave unit the thin metal fibers have a thickness of from 0.02 to 0.06 mm and have a spacing of from 0.09 to 0.12 mm.

We claim:  
     
       1. A door for a microwave unit with a viewing window, said door comprising a metallic door frame, two glass panes held spaced apart from each other in the metallic door frame and a fine woven fabric consisting of thin metal fibers, wherein said line woven fabric is arranged between said glass panes to block or attenuate microwave radiation and said thin metal fibers are in electrically conductive contact with the metallic door frame; 
       wherein said thin metal fibers of the fine woven fabric are woven together with a predetermined small spacing of from 0.09 to 0.12 mm and each of said thin metal fibers has a thickness of from 0.02 to 0.08 mm.  
     
     
       2. The door for the microwave unit as defined in  claim 1 , wherein said fine woven fabric has a linen or plain weave. 
     
     
       3. The door for the microwave unit as defined in  claim 1 , wherein said fine woven fabric is black in order to suppress light scattering effects. 
     
     
       4. The door as defined in  claim 1 , wherein the metal fibers consist of steel fibers.